发光红星系的漫射光封层

论文标题

发光红星系的漫射光封层

The Diffuse Light Envelope of Luminous Red Galaxies

论文作者

Leung, Y., Zhang, Y., Yanny, B., Herner, K., Annis, J., Palmese, A., Sampaio-Santos, H., Strazzullo, V., Aguena, M., Allam, S., Avila, S., Bertin, E., Bhargava, S., Brooks, D., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Costanzi, M., DaCosta, L. N., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Everett, S., Flaugher, B., Frieman, J., García-Bellido, J., Gaztanaga, E., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Honscheid, K., James, D. J., Kim, A. G., Kuehn, K., Kuropatkin, N., Lima, M., Maia, M. A. G., Miquel, R., Ogando, R. L. C., Paz-Chinchón, F., Plazas, A. A., Romer, A. K., Roodman, A., Rykoff, E. S., Sanchez, E., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Smith, M., Suchyta, E., Swanson, M. E. C., Varga, T. N.

论文摘要

我们使用一种堆叠方法来研究Redshift $ \ sim 0.62 $和$ \ sim 0.25 $的发光红星系（LRGS）的径向光谱，以200 kpc的径向范围。我们找不到两个红移处的轮廓的明显演变。 LRG曲线似乎通过单个刻板剖面近似，尽管在60 kpc之外可以看到一些多余的光。我们通过测量综合通量来量化多余的光，并发现多余的大约是10 \％ - 一种不占主导地位但仍然不可忽略的分量。

We use a stacking method to study the radial light profiles of luminous red galaxies (LRGs) at redshift $\sim 0.62$ and $\sim 0.25$, out to a radial range of 200 kpc. We do not find noticeable evolution of the profiles at the two redshifts. The LRG profiles appear to be well approximated by a single Sersic profile, although some excess light can be seen outside 60 kpc. We quantify the excess light by measuring the integrated flux and find that the excess is about 10\% -- a non-dominant but still nonnegligible component.

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